Renaissance Mixed Media Corset Top

Im 5'3, about 138 pounds usually a size M, I was contemplating between getting a size 6 or size 8 and went with the size 6 but it was pretty loose, not form fitting at all which really surprised me because i was scared the 6 would be way too tight. If you're between sizes definitely pick the size down, maybe even 2 sizes smaller if you want it form fitting. Also if you are short and have a shorter torso be aware this top is very long and seems like its sort of made for taller people, even if i sized down again i feel like the length would be awkward (it goes even lower than where my low waisted pants hit)